Cut-off saw



E. PIERCE.

CULOFF SAW,

APPLICATION FILED APR. 1, 191 8.

Patented 9st 3, 19220 4 SHEETS-SHEET l.

E. PIERCE.

CUT-OFF SAW. I APPLICATION FILED APR. 1, 1918- il i fi fifilo Patented M103, 1922.

4 SHEETS--SHEET 3- EASQfiL E. PIERCE.

CUT-OFF SAW.

APPtICATION FILED APR. 1, I918.

Patented Oct. 3, 1922 4 SHEETSSHEET 4.

l ntented that... 3

ta price...

cor-o'er saw.

Application filed April 1, 1918. Seriallt'o. 225,939.

To all'wiwm it may concern:

Be it known that T, EDWARD PIERCE, a

citizen of the United States, residing at West Burlin on, in the county of Des 'Moines and tate of Iowa, have invented certain new and useful Improvements in Cut-0d Saws, of which the following is a specification. 1

This invention relates to a cut off saw adapted'for use in cutting pipe and the like,

' and the invention may be employed either for cutting off the rough end of a pipe or erated'conveniently andfeficiently for cutting pipe. An'important feature of the invention is the provision of novel means for holding pipe in position for receiving either ,"a-square cut or an inclined out adapted for thepurpose of acetylene welding, A. furtheir obpject is to provideimproved means for driving the saw and for" actuating the same when in use. A further feature relates to novel means for holding the pipe to be 0perated upon by the saw. Other objects relate to various features of construction and arrangement which hereinafter.

The nature of the invention will be understood from the following specification taken in connection with the accompanying drawings in which one embodiment of the machine is illustrated. r

In the drawings- Figure 1 shows a side elevation of my improved apparatus; 1

Fig. 2 shows an end elevation, looking toward the right as viewed in Fig.1, with parts thereof broken away;

Fig. 3 shows a top plan view of the mav chine illustrating a pipe held in position to have the end thereof out off transversely its longitudinal axis;

Fig. 4 shows a partial top plan view of the machine illustrating a pipe held in position for receiving an inclined cut adapted for the purposeof forming an acetylene weld;

Fig. 5 is a detail sectional view taken on V the line 55 of Fig. 3 looking in the direction of the arrows, showing the adjustable plate for regulating the height of the pipe being operated upon by the machine;

Fig.6 shows two pipes placed together will appear more clearlyfor acetylene-welding after being operated upon by the machine in the manner illus trated in Fig. 4:; and

Fig. 7 shows a partial side elevation of the motor casing with a part thereof broken away to show the driving connection to the shaft of the saw;

The machine illustrated in the accompany- 111g drawings comprises a supportingframe 10 having two end frames 11 each having a leg l1*-"-inclined in a plane extending longitu'dinally of the machine and a leg 11 inclined in a transverse plane, these legs being constructed, preferably of angle iron form. The end frames are connected at the forward side of the machine by a transverse frame member '12, and the frames 11 are also connected adjacent the lower part of the machine by transverse frame members 13 of angle iron form which extend between oppositepairs of legs 11 and 11". The legs 11? and 11? of each end frame 11 are connected by frame members 1e. These members form a rigid supporting structure which may be conveniently peeved and readily secured in an desiredjposition he frame 10 supports an air motor housed within a cylindrical casing 15 which is mounted in the enclosure formed by the frame and supported thereon by means of the inlet pipe 16 and the exhaust pipe 17, which extend from and are secured to opposite sides of the cylinder of the motor in alinement with each other to. form stub 'shafis adapted to be journalled in bearing members 1K8 carried by the frame members 13, previ ously described, to which they are secured by bolts -19.' The motor is preferably of the radial vane type, being o-peratedby compressed air or the like, which is introduced through the pipe 16 and exhausted through the pipe 17. The flow of compressed fluid through the pipe 16 is controlled by a main operating valve 20 having a valve stem 20 pivotally connected to an operating lever 21 having a handle 21 adjacent the upper part of the machine. The lower end of'the lever 21 is pivoted at the point 22 on a bracket 23, which has bifurcated arms 23 clamped to thc'casing of the valve 20. The valve 20 communicates with an elbow 24 from which a pipe extends downwardly and communicates with the horizontal extension 16 of the inlet pipe which leads from a suitable source of compressed air supply. The extension 16 of the inlet pipe extends horizontally beneath the motor and is suspended from the operating lever 21 moves through a Slot 27 in thelever guard 28, which is carried by the adjacent frame member 13 and one of the legs 11 When the lever 21 is operated to open the valve 20, compressed fluid isadmitted to the motor, and the shaft thereof is rotated to drive the mechanism hereinafter to be described. I I

The extension 30 of the casing of the motor 15 forms a housing for the motor shaft 31 and also encloses the gears through which the motor shaft is connected to the spindle 32 of the saw. The housing 30 is closedat its upper endby a cap 33 in which the end of the shaft 31 is journalled, and this shaft is preferably connected to the spindle 32 through a worm 34 which is fixed thereon and arranged to mesh with a worm gear 35 carried by the spindle 32 extending transversely to the shaft 31 and mounted ina lateral extension 30 of the casing 30. The worm and worm gear are lubricated by means of a grease cup 36. The saw 37 is fixed on the projecting .end of the spindle adjacent the forward side of the machine, and the'other 'endof the shaft is engaged by the saw spindle nut 38. A standard 39 extends upwardly from the cap 33 of thehousing 30 and carriesan oil pot 40 having a valve 41 adjacent the lower part thereof located over the saw 37: and controlled by an operating handle 41*. This valve may be regulated to cause the desired flow of oil onto the saw when the latter is in operation.

The oil which drains off of the saw is collected by a waste oil trough 43 mounted beneath the saw and extending longitudi-- nally of the frame to which it is connected by suitable brackets '44 or the like. A drain pipe'45 leads from the trough 43 to a waste ing therefrom to engage the slot 52 of thefeed nut slide 53 carried by the extension 30 of the motor casing. When the feed screw 48 is rotated. in a clockwise direction, the

I movement of the feed nut 51 will oscillatethe casing of the motor about its bearings 18 carried by the frame, and thus cause the saw 37 to be moved toward and through the work to be operated upon: It will be observed that during this operation the en tirev driving mechanism oscillates and that the oil feed for the saw is carried 'bodily with the saw, so. that the feed ofoil thereon remains constant during its operation. 1

- When using the saw for forming a square fixed on the post 60 at one end of the frame 60, and the pipe 55 is forced against this jaw by means of the movable jaw 56 which is detachably mounted on the piston rod 63. The piston rod is slidably mounted in the post 60*, andthe connection of the jaw 56 to the piston rod is preferably made by means of a' vertically-extending T-shaped tongue 61" on the piston rod and a similarly shaped groove on slot 56 in the rear face of the jaw. The jaw normally slides on the I frame 60, but when desired the jaw may be removed from the piston rod and suspended at the side of the machine by means of a chain 62, which'is connected to the post 60 of the frame 60 located opposite the post 60% The air cylinder 64 iscarried by the post 66" and extends laterally therefrom. A piston 65 is mounted on the piston rod 63 within the enlarged end portlon 64 of the cylinder, and when compressed air is admitted thereto, the piston and piston rod' are moved in a forward direction to cause the jaw 56 to engage the pipe. When the compressed'air is shut off, the piston and jaw are returned to their normal positions by means of a coiled spring 66 mounted on the piston rod within the reduced portion 64 of the cylinder. The flow of compressed air to the cylinder 64 'is' controlled by an inlet valve 68 having a handle 68*, and the.

airflows through this valve'from a pipe 69, preferably of copper or thelike, which exthe inlet pipe 16 on the dischargeside of the air valve 20, so that when the main valve 20 is open air will beadmitted to the cylinder 64, providedthe 'valve .68 is open'. The jaws 56 and 58 are adapted to operate on different sizes of pipe, and to permit a firm support of the material being operated upon, regardless of its size, there is provided an adjustable supporting block 70 carried by the frame 60 and having a slot 70 to receive the saw 37. The block 70 has a vertically extending tongue 71 adapted-to slide in .a vertical groove, or guideway, 72-formed in the face of the post 60, and the position of-the supporting block may be adjusted by means of a bolt 73 which extends through a vertical slot 74 tends downwardly and communicates with 1,4ao,eei m in fixed position on the post 7 9- at one end of the frame 79, and the other jaw 77 is slidably mounted on the supporting frame and connected to a piston rod 80, which extends into the air cylinder 81 carried by the frame 79 and provided with a piston 82 and a spring 83, whereby the piston rod 80 is actuated when air is admitted to the cyl-.

inder and is returned to normal position by the spring when the air is cut off. Air is admitted to the cylinder 81 through another I valve 84 to which air is introduced through a pipe 85 leadingfrom the discharge side of the main valve 20. When the cylinder 81 is .to be used, the valve 84 is opened and the valve 68 controlling the flow of air to the other cylinder 64: is closed. The opening of the main valve 20 will then admit air to the cylinder 81 and will cause the jaws 77 and 78 to grip and hold the pipe 55, as shown in Fig. 1. When using the machine for cutting a pipe held between the jaws 77 and 7 8', the pipe .55 is provided with a bend 55 inwardly from the jaws, and the projecting end 55 of the pipe is directed over the frame 60, previously described, and against the jaw 58. The jaw 56 may preferably be removed during this operation and suspended at the side of the machine by means of the chain 62. Then when the saw is moved forwardly by the operation of the feed-screw 48, the pipe 55 will be held firmly by the jaws 77-78 and will be supported against the jaw 58, so that a clean out can be made through the pipe in an inclined direction It will be apparent that when using the machine for forming a straight out or awelding cut, the jaws are set in operation to grip the piece as soon as the air is turned on through t-hemain valve 20, provided the controlling valve 68 or .84: has previously been opened, and, at the same time, the saw 37 begins to operate, sothat after opening the main valve 20 it is only necessary to begin operation of the feed screw 48 by turning the wheel 50, thereby moving the saw 37 into engagement with the piece. The saw is thus very conveniently operated and a firm gripping of the piece is insured when thesaw is in operation.- It will be understood that when one of the air cylinders 64: or 81 is in operation, the air valve for the other cylinder-should be closed. After completing the out through the pipe or the like, the

for holding a piece to be operated upon, a

lever 21 may be operated to close theniain 'valve 20, whereby the saw will be stopped and the jaws automatically separated to release the body of the pipe. The feed screw is then operated in the reverse direction to return the saw to its normal position.

' Although I have shown and described a single embodiment of the invention-fffor purposes of illustration, it will-be under stood that it may be constructed i'n widely different forms without departing from the scope of the appended claims:

hat I claim is:

1. In apparatus of the class described;

a motor having a casing, a saw carried flay said caslng on a shaft disposed at an a to the shaft of sa d motor, means for. ea

motor, a casing therefor, opposite]ydisposed stub shafts mounted on said casing i f, ngs for said shafts, a saw earned by ing of said motor and driven thereby,

mg said shafts together, means forhold ng a piece to be operated upon. and mea'n'sfor means for oscillating said motor onj'sa'id shafts to move said saw into engage nent with said piece. v v

3. In apparatus of the class ClGSCIIbQKl Zt frame, a motor movably mounted n said frame with its shaft extending in an 11 5-,

wardly direction, a saw spindle carried by the casing of said motor, a saw mounted on said spindle, means for gearing said spindle to the shaft of said motor. means for holdmoving said casing to bring said saw into engagement with said piece. and means movable with said saw for supplying oil thereto. i 1-. In apparatus of the class described, a frame, a motor movably mounted in said frame, a saw spindle carried by the casing of said motor, a saw mounted on said spindle, means for holding a piece to be operated upon, a feed nut operatively connected to the casing of said motor, and a feed screw mounted in said frame and engaging said nut for moving said casing and thereby bringing said saw into engagement with said piece. p

In apparatus of the class described, a frame, a fluid operated motor having inlet and outlet pipes forming supporting shafts therefor, bearing members mounted on said frame and engaged by said pipes, means for controlling the flow of fluid through said aides, a cuttin tool movable with said mo-' tor and operated thereby, and means for moving said motor about said bearings for bringing sfaid cutting tool into operative position.v

6. In apparatus of the class described, a frame, a fluid operated motor having inlet and outlet pipes forming supporting shafts therefor, bearing members mounted on said frame and engaged by said pipes, means for controlling the flow of fluid through said pipes, the casing of said motor having an tion.-

7. Inapparatus of the class described, a frame, a motor pivotally mounted in-said frame, the casing of said motor having a hollow extension, a saw spindle mounted in saidextension, means also mounted in said extension for connecting said saw spindlewith said motor, a saw mounted on said spindle, and means for controlling the pivotal movement of said motor for moving said saw into engagement with the work operated upon. p 8. In apparatustof the class described, a frame,' a pair of jaws mounted on said frame, means for removing, one of said jaws, a saw mounted adjacent said jaws, means for moving said saw into and out of engagement with a piece held by said jaws, and adjustable means for supporting the end of said piece flopp'osite said saw. a

9. In apparatus of theclass described, a

I frame, a pair of relatively movable jaws mounted on said frame, a third jaw also mounted on said frame and disposed adja-' cent said first named jaws in such wise that the end of a curved piece of work. clamped between said first named jaws may engage said third jaw, a saw, means for actuating said saw, and means for moving said saw into engagement with said piece.

10. In apparatus of the class described, a

" frame,,a pair of relatively movable jaws mounted on said frame, a saw, means for simultaneously actuating said saw and one of said jaws, and means for moving said saw into engagement with a piece held by said aws.

11. In apparatus of the class described, a frame, a motor movably mounted in said frame with its shaft extending in an upward direction, 9 SaW spindle carried by the casing of said motor, a saw mounted on said spindle, mean's for gearing said spindle to the shaft of said motor, means for holding a piece. to be operatedupon, and means for moving said casing to bring said saw into engagement with said piece.

12. In apparatus of theclass described, a frame, a motor pivotally mounted thereon with'its shaft disposed upwardly, a casing for said motor and said shaft, a saw blade carried by said casing near the upper end of the same and being adapted to be driven from said shaft by means of said. motor,"

means for holding the work to be operated upon, and means for moving said casing in such wise as to bring said saw into engagement with said work.

13. In apparatus of theclass described, a

frame, a motor pivotally mounted on said fluid throughsaid pipes, a cutting tool movable with said motor and operated thereby,

means for moving said motor about sald shafts for bringing said cutting tool into operative position, fluid-actuated clamping means for the work to be operated upon, and a connection between said clamping means and said inlet pipe. whereby upon actuation of said controlling means said cutting tool and clamping means are simultaneously operated.

15. In an apparatus of the class described, a frame, a motor pivotally mounted thereon on an axis angularly disposed relatively to the motor: shaft, a saw blade carried by the casing of said motor and operated by the latter, andmeans for oscillating said motor on its pivots to operatively position said saw blade.

16. In an apparatus of the class described, a frame, a fluid motor movably mounted thereon, a saw blade carried bythe casing =of'said motor and operated by the latter,

means for moving said motor to operatively position said saw blade with respectto the work, means for clamping said work in mounted thereon on an'axis angula-rly dis,-

posed relatively to the motor shaft, the pivots of said motorconstituting the inlet and outlet for the same, a saw blade carried by the casing of saidmotor and operated by the latter, means for oscillating said motor to operatively position said saw blade with respect to the work, clamping means for the latter, and a connection between said clamp-- I ing means and said'inlet whereby upon the opening of the latter said saw blade and clamping means will be simultaneously actuated.

In testimony whereof, I hive subscribed I my name.

EDWARD PIERCE; 

